Apparatus for producing corrosion-resisting conduits.



G. MONRATHY.

APPARATUS FOR PRODUCING CORROSION RESISTING CONDUITS.

APPLICATION mm MAY 21. 9H5.

1 ,292,0 1 O Patented J an. 21, 1919.

351 @H'ozncu:

M M haw? UNITED STATES PATENT OFFICE.

COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

APPARATUS FOR PRODUCING CORROSION-RESISTING CONDUITS.

To all whom it may concern:

Be it known that I, Gus'rev Monnam, a citizen of the United States, residmg 1n Chuquicamata, Republic of Chile, South America, have invented certain new and useful Improvements in Apparatus for Producing Corrosion-Resisting Conduits; and I do hereby declare the following to be a full, clear, and exact description of the lnv'ention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to the manufacture of corrosion-resisting pi es or conduits capable of withstanding sa ely pressures up to,

for example, 100 pounds per square inch or more, and capable of conducting without corrosion acids of various strengths and combinations, and articularly to molds for use in such manu acture.

The novel pipe or conduit of the present invention is made of a hard asphaltum mastic composition, reinforced with iron embedded in the mastic in such a way as to give to the pipe or conduit the necessary strength and the capacity of withstanding the desired internal pressure.

The invention Will be further described in connection with the embodiments thereof illustrated in the accompanying drawings, in which:

Figure 1 shows in perspective the molding apparatus for producing the pipe or con uit' Fig. 2 shows the collapsible core;

Fig. 3 is an end view of the core; and

Fig. 4 is a sectional view showin the mold with the pipe cast therein aroun the core.

In casting the pi e or conduit referred to above, I have foun it of advantage to make use of a mold of rolled iron or other appropriate material, the lower half 6 of which Is made in one piece and the upper half in two pieces 7 hinged to the lower half. These two upper ieces do not come together but remain spaced apart and have flan es 8 extending upwardly therefrom leaving t erebetween an openin of, for example, three to five inches in wi th depending on the size of the pipe to be cast. This opening serves to facilitate the pouring of the hot material into the mold and enables a ,ridge to he formed integrally as a part of the conduit.

The mold is provided with endplates 9 of any appropriate construction which will 'Bpeciflcation of Letters Patent.

3 purposes of removal.

Patented J an. 21, 1919.

Application filed Key 27, 1916, Serial No. 100,418.

permit the core to be inserted and removed and accurately centered and supported thereby and which will also permit ready removal of the finished conduit.

The core 10 is collapsible and its construction may be varied. I have found that a wooden core can be used to advantage, made in five pieces, as shown, suitably arranged and proportioned so that the arts may be readily assembled and collapse for The core illustrated is made up of the upper and lower parts 11, the side pieces 12, and the central part 13, the extensions of which form the support and bearing for the core in the mold.

In preparing to cast the conduit I have found it of advantage to cover the wooden core ,with paper 16 pasted to the Wood in order to prevent the mastic material from sticking to the wood. The heat of the mastic material during the casting operation destroys the pasting and allows the wooden core to be separated readily from the paper which remains attached to the inside of the pipe and can be afterward removed, if desired, by washin or otherwise.

After the core as been prepared, the iron reinforcement in the shape of an open cylinder, is placed over the core and the core is then ready to insert in the mold. In the accompanying drawings the iron reinforcement is illustrated as made up of an expand- GIISTAV MONRATH, OF GHUQUICAMATA, CHILE, ASSIGNOB, TO CHILE EXPLORATION ed metal cylinder 3 suitably fastened together at its uniting edges, and over which is wound a wire 4. In order to make the casting more easily removable the mold is given a coating of a suitable material such as soft soap. The mold is then filled with hot mastic material to a depth varying somewhat with the size of the pipe, for example, to a de th of about four inches in the lower part 0 the mold. The core .with the reinforcing cylinder is then slowly pressed down into the molten mastic. In order that the reinforcement may be properly centered and spaced with respect to the core and the mold so that it will be well embedded within the finished conduit, it may be suitably centered and supported by the end pieces of the mold or from the core by any appropriate supit is flush wit 1 forcing cylinder,

tween the bottom of the core and the bottom exact center. Where part of the mastic has been poured into the bottom of the open mold before insertion of the core and remit .will fill the space heof the mold and will extend up part way around the core, depending upon the size of the mold and core and the amount of the mastic thus introduced.

After the mold has been closed, the hot mastic composition is poured in through the slot or openin at the top of the mold until the ed e of the flanges 8. The pipe or conduit is t us cast in the form of an integral or continuous tube or pipe '14 without joints, and with a ridge or projection 15 on its upper side which serves as a stiffening for the finished pipe or conduit. This ridge may be made of difierent sizes and Xwider or narrower, and thinner or thicker, as desired. It may thus be made of considerable Width so that it ma formva strengthening rib on the bottom 0 the pipe,

and a support for the pipe, in use. In addiand upper mold sections forming in combi-* nation a substantially cylindrical mold inanaemic I dependent of the conduit cast therein and from which the conduit may be removed by to turning the upper mold sections on their pivots and thereby opening themold, and means for supporting a core Within the mold; substantially as described.

2. A ermanent mold suitable for use in the casting of portable corrosion-resisting conduits of asphaltum mastic composition comprising a substantially semi-cylindrical lower mold section, .an upper mold section pivoted to each upper edge of said lower mold section, said lower and upper mold sections forming in combination a substantially cylindrical mold independent of the condult cast therein and from which the conduit may be removed by turning the upper mold sections on their pivots and thereby opening the mold, and means for supporting a core within the mold; substantially as described.

3. A permanent mold suitable for repeated use in the casting of portable corroslon-resisting conduits ofasphaltum mastic composition comprising .a lower mold section curved transversely. to form a horizontally disposed trough to receive and sustain the composition, an upper horizontally disposed transversely curved mold section permanently hinged to each upper edge of said lower mold section, said lower and upper mold sections forming in combination a permanent mold of cylindrical configuration from which the cast conduit may be removed by turning the upper mold sections on their hinges, and means for supporting a core ,within the mold; substantiallyas describtd. In testimony whereof I afix my signature.

. GUSTAV MONRATH. 

